CN101777945B - Method for sending reference signal in multi-antenna communication system and base station - Google Patents
Method for sending reference signal in multi-antenna communication system and base station Download PDFInfo
- Publication number
- CN101777945B CN101777945B CN 200910076638 CN200910076638A CN101777945B CN 101777945 B CN101777945 B CN 101777945B CN 200910076638 CN200910076638 CN 200910076638 CN 200910076638 A CN200910076638 A CN 200910076638A CN 101777945 B CN101777945 B CN 101777945B
- Authority
- CN
- China
- Prior art keywords
- antenna
- reference signal
- physical
- antenna port
- base station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004891 communication Methods 0.000 title claims abstract description 18
- 238000013507 mapping Methods 0.000 claims abstract description 90
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 11
- 230000003760 hair shine Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 230000007774 longterm Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 239000000546 pharmaceutical excipient Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a method for sending a reference signal in a multi-antenna communication system. The method comprises the following steps of: determining a mapping pattern of a public reference signal at a 0-3 antenna port to adopt a mapping pattern of a public reference signal of an LTE-R8 system by a base station; dividing eight physical antennae into four groups by the base station; mapping the public reference signal at the 0-3 antenna port onto the eight physical antennae, wherein each group of physical antennae corresponds to one antenna port; and sending the mapped information through the eight physical antennae by the base station, wherein the sending power of each antenna is one eighth of the total sending power of the base station. The invention can ensure the compatibility of the system, can flexibly support the coexistence of the LTE-R8 terminal and the LTE-A terminal, decrease the complexity of the system, furthest reduce the expense caused by the reference signal, and enhance the system throughout and the source utilization ratio of the system.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly a kind of sending method of reference signal in multi-antenna communication system and base station.
Background technology
MIMO (Multiple-Input Multiple-Out-put, multiple-input and multiple-output) technology is played an important role in communication system of new generation as important raising transmission quality and the physical layer multi-antenna technology of efficient.For example, transmit diversity, the multiple MIMO technology such as space multiplexing technique and BF (Beam forming, beam shaping) have been applied in LTE (Long Term Evolution, Long Term Evolution) system.
In present LTE-R8 (Long Term Evolution Release 8, Long Term Evolution version 8) system, transmit diversity and space diversity are supported at most 4 antenna ports, and adopt public reference signal to complete to measure and the demodulation of each antenna port signal; And wave beam forming adopts DRS (Dedicated Reference Signal) demodulation user data.As illustrated in fig. 1 and 2, be respectively the mapping schematic diagram of the descending public reference signal of conventional CP (CyclicPrefix, Cyclic Prefix) and expansion CP in prior art LTE-R8 system.LTE-R8 system descending public reference signal sends in each descending sub frame, covers the whole system bandwidth on frequency domain, in time across whole descending sub frame,
As illustrated in fig. 1 and 2, in figure, R0, R1, R2, R3 represent respectively the public reference signal of antenna port 0-3.public reference signal is mainly used in (the Physical Downlink SharedChannel to PDSCH, DSCH Downlink Shared Channel) PDCCH (Physical Downlink Control Channel, down control channel), PCFICH (Physical Control Format Indicator Channel, the control format indicating channel), PHICH (Physical Hybrid ARQ Indicator Channel, mixed automatic re-transmission indicating channel), PBCH (Physical Broadcast Channel, Physical Broadcast Channel) etc. demodulation, CQI (Channel Quality Indicator, CQI) estimate, non-excipient user's channel estimating, measurement when switch the residential quarter etc.Public reference signal is in the full bandwidth configuration, and conventional CP reference signal expense is 14.3%, and expansion CP is 16.7%.At present, LTE-A (LongTerm Evolution-Advanced, the high bandwidth Long Term Evolution) standardization effort of system carries out, and for satisfying the requirement of its peak rate, the antenna Enhanced Technology such as 8 * 8MIMO, multithread BF (such as double-current BF) have become critical technology.Yet if 8 * 8 antenna pilots send fully with reference to 4X4 antenna pilot design, so conventional CP reference signal expense will increase to 28.6%, and expansion CP will increase to 33.4%.This will cause the expense of reference signal excessive, affects the throughput of system, causes the wasting of resources.
Therefore, the DRS (Dedicated Reference Signal) that how to send reference signal in multi-antenna communication system and configuration antenna port becomes problem demanding prompt solution in the LTE-A system.The design of reference signal not only will guarantee the performance of LTE-A system, the precision of guaranteeing joint channel estimation can not reduce, can performance and the covering of system do not exerted an influence, also need simultaneously to reduce as much as possible the expense of being introduced by reference signal, the throughput of raising system, the raising system is to resource utilization.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, particularly solves the transmission problem of reference signal in multi-antenna communication system.
For achieving the above object, one aspect of the present invention has proposed a kind of sending method of reference signal in multi-antenna communication system, comprise the following steps: the base station determine to send the mapping pattern of descending public reference signal, and the mapping pattern of the public reference signal of 0-3 antenna port adopts the mapping pattern of the public reference signal of LTE-R8 system; Described base station is equally divided into four groups with eight physical antennas, shines upon according to described mapping pattern, and the public reference signal of described 0-3 antenna port is mapped to eight physical antennas, every group of corresponding antenna port of physical antenna; Information after described base station will be shone upon sends through described eight physical antennas, and the transmitted power of every antenna is 1/8 of the total transmitted power in base station.
According to embodiments of the invention, described base station each group from four groups of physical antennas is selected an antenna and is formed four physical antennas, and four are sent by described four physical antennas based on user's DRS (Dedicated Reference Signal) and/or the public reference signal of 4-7 antenna port.
According to embodiments of the invention, described DRS (Dedicated Reference Signal) based on the user sends on the frequency band that the terminal use who supports base station eight antenna port transmission dispatches, and described terminal use is used for channel estimating and signal demodulation with described DRS (Dedicated Reference Signal); The public reference signal of described 4-7 antenna port sends on the frequency band of system's appointment, supports the terminal use of base station eight antenna port transmission that described public reference signal is used for channel measurement.
According to embodiments of the invention, when the public reference signal with described DRS (Dedicated Reference Signal) based on the user and 4-7 antenna port sends by described four physical antennas, the mapping pattern of downlink dedicated reference signal is determined to send in described base station, be a subset as the mapping pattern of described downlink dedicated reference signal with the mapping pattern of the time-frequency domain of the public reference signal of 4-7 antenna port, make the public reference signal of described 4-7 antenna port and described downlink dedicated reference signal not conflict.
According to embodiments of the invention, the density of described DRS (Dedicated Reference Signal) based on the user is identical or lower with the density of the public reference signal of 2-3 antenna port.
According to embodiments of the invention, the density of the public reference signal of described 4-7 antenna port is identical lower than the density of the public reference signal of 2-3 antenna port, perhaps lower than the density of described DRS (Dedicated Reference Signal) based on the user.
According to embodiments of the invention, described base station is equally divided into four groups with eight physical antennas and comprises:
Correspondingly, the public reference signal of 0 antenna port is mapped to physical antenna 1 and physical antenna 5, the public reference signal of 1 antenna port is mapped to physical antenna 2 and physical antenna 6, the public reference signal that the public reference signal of 2 antenna ports is mapped to physical antenna 3 and physical antenna 7,3 antenna ports is mapped to physical antenna 4 and physical antenna 8.
According to embodiments of the invention, described base station each group from four groups of physical antennas is selected four physical antennas of an antenna composition and is comprised:
Physical antenna 5-8 forms described four physical antennas, and perhaps physical antenna 1-4 forms described four physical antennas.
The present invention has proposed a kind of base station on the other hand, comprises mapping pattern determination module, Antenna Selection Module, mapping block and sending module,
Described mapping pattern determination module be used for to determine sends the mapping pattern of descending public reference signal, and wherein, the mapping pattern of the public reference signal of 0-3 antenna port adopts the mapping pattern of the public reference signal of LTE-R8 system; Described Antenna Selection Module is used for eight physical antennas are equally divided into four groups, every group of corresponding antenna port of physical antenna; Described mapping block is used for shining upon according to described mapping pattern, and the public reference signal of described 0-3 antenna port is mapped to eight physical antennas; Described sending module is used for the information after mapping is sent through described eight physical antennas, and the transmitted power of every antenna is 1/8 of the total transmitted power in base station.
According to embodiments of the invention, described Antenna Selection Module each group from four groups of physical antennas is selected an antenna and is formed four physical antennas, and four are sent by described four physical antennas through described sending module based on user's DRS (Dedicated Reference Signal) and/or the public reference signal of 4-7 antenna port.
According to embodiments of the invention, described sending module will send on the frequency band that the terminal use who supports base station eight antenna port transmission dispatches based on user's DRS (Dedicated Reference Signal), and described terminal use is used for channel estimating and signal demodulation with described DRS (Dedicated Reference Signal); The public reference signal of described 4-7 antenna port is sent on the frequency band of system's appointment, support the terminal use of base station eight antenna port transmission that described public reference signal is used for channel measurement.
According to embodiments of the invention, described mapping pattern determination module is used for determining to send the mapping pattern of downlink dedicated reference signal, be a subset as the mapping pattern of described downlink dedicated reference signal with the mapping pattern of the time-frequency domain of the public reference signal of described 4-7 antenna port, make the public reference signal of described 4-7 antenna port and described downlink dedicated reference signal not conflict.
According to embodiments of the invention, described Antenna Selection Module is equally divided into four groups with eight physical antennas, comprising: physical antenna 1 and physical antenna 5 are one group, and physical antenna 2 and physical antenna 6 are one group, physical antenna 3 and physical antenna 7 are one group, and physical antenna 4 and physical antenna 8 are one group; Correspondingly, the public reference signal of 0 antenna port is mapped to physical antenna 1 and physical antenna 5 through described mapping block, the described mapping block of the public reference signal of 1 antenna port is mapped to physical antenna 2 and physical antenna 6, the described mapping block of public reference signal that the described mapping block of the public reference signal of 2 antenna ports is mapped to physical antenna 3 and physical antenna 7,3 antenna ports is mapped to physical antenna 4 and physical antenna 8.
According to embodiments of the invention, described Antenna Selection Module each group from four groups of physical antennas is selected an antenna and is formed four physical antennas, comprise: physical antenna 5-8 forms described four physical antennas, and perhaps physical antenna 1-4 forms described four physical antennas.
The present invention had both guaranteed the compatibility of system by send neatly the DRS (Dedicated Reference Signal) of reference signal and configuration antenna port in the LTE-A system, can support flexibly coexisting of LTE-R8 terminal and LTE-A terminal, had also reduced system complexity.The design of the reference signal that proposes according to the present invention, can not only guarantee the performance of LTE-A system, the precision of guaranteeing joint channel estimation can not reduce, can performance and the covering of system do not exerted an influence, go back simultaneously the expense that reduce is introduced by reference signal, the throughput of raising system, the raising system is to resource utilization.
The aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or the additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
Fig. 1 is the mapping schematic diagram of the descending public reference signal of conventional CP in the LTE-R8 system;
Fig. 2 is the mapping schematic diagram of the descending public reference signal of expansion CP in the LTE-R8 system;
Fig. 3 is the sending method flow chart of embodiment of the present invention reference signal in multi-antenna communication system;
Fig. 4 is the density mapping pattern identical with the density of the reference signal of 2-3 antenna port of the public reference signal of embodiment of the present invention 4-7 antenna port;
Fig. 5 is that the density of public reference signal of embodiment of the present invention 4-7 antenna port is lower than the mapping pattern of the density of the reference signal of 2-3 antenna port;
Fig. 6 a is the non-frequency hopping mapping pattern of the public reference signal of embodiment of the present invention 4-7 antenna port;
Fig. 6 b is the frequency hopping mapping pattern of the public reference signal of embodiment of the present invention 4-7 antenna port;
Fig. 7 is the structural representation of embodiment of the present invention base station.
Embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
The present invention proposes a kind of sending method of reference signal in multi-antenna communication system, comprise the following steps:
The base station determine to send the mapping pattern of descending public reference signal, and the mapping pattern of the public reference signal of 0-3 antenna port adopts the mapping pattern of the public reference signal of LTE-R8 system; Described base station is equally divided into four groups with eight physical antennas, shines upon according to described mapping pattern, and the public reference signal of described 0-3 antenna port is mapped to eight physical antennas, every group of corresponding antenna port of physical antenna; Information after described base station will be shone upon sends through described eight physical antennas, and the transmitted power of every antenna is 1/8 of the total transmitted power in base station.
In the present invention, multiaerial system is eight antenna ports, is expressed as respectively the 0-7 antenna port, and wherein each antenna port is virtual antenna port, the information of an antenna port can be mapped to one or more physical antenna.
As shown in Figure 3, the sending method flow chart for embodiment of the present invention reference signal in multi-antenna communication system comprises the following steps:
Step S301, the mapping pattern of descending public reference signal is determined in the base station, the mapping pattern of the public reference signal of 0-3 antenna port adopts the mapping pattern of the public reference signal of LTE-R8 system.
For the descending public reference signal of the system that makes evolution and original LTE-R8 system compatible, assurance LTE-R8 seamlessly transits to LTE-A's, and the technical scheme with eight antenna ports that the present invention proposes remains unchanged in the public reference signal design of 0-3 antenna port.In addition, RSRP, the measurement of RSRQ all is based on 0/1 antenna port, and for the accuracy that guarantees to measure, it is higher that the pilot density of 0-1 antenna port still keeps.Yet, based on above analysis, if the standard according to present LTE-R8 system is configured in the LTE-A system, 8 * 8 antenna pilots arrange complete in the plan of establishment of 4X4 antenna pilot, so conventional CP reference signal expense will increase to 28.6%, and expansion CP will increase to 33.4%.This will cause the expense of reference signal excessive, affects the throughput of system, causes the wasting of resources.Therefore, in the present invention, except the compatibling problem of solution with present LTE-R8 system reference signal, the design to reference signal has been proposed also.
Step S302, the base station is equally divided into four groups with eight physical antennas, and the public reference signal of 0-3 antenna port is mapped to eight physical antennas, every group of corresponding antenna port of physical antenna.
In step S302, adopt the mapping pattern of the public reference signal of LTE-R8 system due to the mapping pattern of the public reference signal of the 0-3 antenna port of determining in step S301, therefore need to complete public reference signal is mapped to eight physical antennas.
As embodiments of the invention, the base station is equally divided into four groups with eight physical antennas, every group of corresponding antenna port of physical antenna.
The base station is equally divided into four groups with eight physical antennas and has numerous embodiments.For example, physical antenna 1 and physical antenna 5 are one group, and physical antenna 2 and physical antenna 6 are one group, and physical antenna 3 and physical antenna 7 are one group, and physical antenna 4 and physical antenna 8 are one group.In addition, also comprise: physical antenna 1 and physical antenna 2 are one group, and physical antenna 3 and physical antenna 4 are one group, and physical antenna 6 and physical antenna 5 are one group, and physical antenna 8 and physical antenna 7 are one group; Physical antenna 1 and physical antenna 4 are one group, and physical antenna 2 and physical antenna 5 are one group, and physical antenna 3 and physical antenna 6 are one group, and physical antenna 7 and physical antenna 8 are one group; And other compound mode.
Obviously, for different packet modes, the physical antenna numbering of every group is different, if therefore adopt above-mentioned certain antenna packet mode in the follow-up scheme of the present invention, also can realize same technique effect.Set forth the present invention for further, other following embodiment will be grouped into example with the first antenna and be illustrated brief and concisely.
As embodiments of the invention, when physical antenna is equally divided into four groups be:
The user terminal that receives signal utilizes antenna port 0 can estimate channel information H
0=h
1+ h
5, utilize antenna port 1 can estimate channel information H
1=h
2+ h
6, utilize antenna port 2 can estimate mixed channel information H
2=h
3+ h
7, utilize antenna port 3 can estimate mixed channel information H
3=h
4+ h
8, h wherein
1～h
8Channel corresponding to physical antenna 1-8.For the LTE-R8 terminal, can carry out channel measurement and demodulation based on the common pilot signal of 4 antenna ports, be 1/8 by the transmitted power that makes each antenna, gross power is kept the systems compliant with LTE-R8, has guaranteed the compatibility with the LTE-R8 system.
As embodiments of the invention, for eight antenna port transmitting systems, base station each group from four groups of physical antennas is selected an antenna and is formed four physical antennas, and four are sent by above-mentioned four physical antennas based on user's DRS (Dedicated Reference Signal) and/or the public reference signal of 4-7 antenna port.
Obviously, for different antenna packet modes, although the numbering of four physical antennas selecting can be different, can realize same technique effect.
Be grouped into example with the first physical antenna, physical antenna 5-8 forms above-mentioned four physical antennas, and perhaps physical antenna 1-4 forms above-mentioned four physical antennas.In addition, physical antenna 0,2,5,7 and 1,3,4,6 can form above-mentioned four antennas equally, and other block form.
Take above-mentioned four physical antennas as 5-8 as example, user terminal can estimate the channel information h of 4 physical antennas
5, h
6, h
7, h
8The channel information H that obtains according to open reference signal
0=h
1+ h
5, H
1=h
2+ h
6, H
2=h
3+ h
7, H
3=h
4+ h
8, both subtract each other, and can draw channel information h corresponding to physical antenna 1-4
1, h
2, h
3, h
4, based on the channel information of 8 physical antennas that obtain, user terminal can carry out the demodulation of 8 * 8MIMO transfer of data.
Usually, four DRS (Dedicated Reference Signal)s based on the user send on the frequency band that the terminal use who supports base station eight antenna port transmission dispatches, and the terminal use is used for channel estimating and signal demodulation with DRS (Dedicated Reference Signal).The public reference signal of 4-7 antenna port sends on the frequency band of system's appointment, supports the terminal use of base station eight antenna port transmission that public reference signal is used for channel measurement.Therefore, four are to send on partial-band based on user's DRS (Dedicated Reference Signal) and the public reference signal of 4-7 antenna port, rather than send on Whole frequency band.
Under the good scene of channel condition, can consider to use at above-mentioned four physical antennas the design of lower reference signal density when eight antenna port transmission systems, wherein reference signal comprises public reference signal or based on user's DRS (Dedicated Reference Signal).
As embodiments of the invention, four can only send at partial-band based on user's DRS (Dedicated Reference Signal)s, and identical or lower based on the density of the density of user's DRS (Dedicated Reference Signal) and the public reference signal of 2-3 antenna port.Take conventional CP as example, as shown in Figure 4, be the density mapping pattern identical with the density of the reference signal of 2-3 antenna port of the public reference signal of embodiment of the present invention 4-7 antenna port; As shown in Figure 5, be the density of the public reference signal of the embodiment of the present invention 4-7 antenna port mapping pattern lower than the density of the reference signal of 2-3 antenna port.
As embodiments of the invention, the public reference signal of 4-7 antenna port can only send at partial-band, its objective is the measurement that is used from channel with public port 0-3 one, comprises the generation of channel information quality indicator (CQI) and pre-coding matrix.In the present embodiment, the density of the public reference signal of 4-7 antenna port is identical lower than the density of the public reference signal of 2-3 antenna port, perhaps lower than the density based on user's DRS (Dedicated Reference Signal).
When existing public reference signal based on user's DRS (Dedicated Reference Signal) and antenna port 4-7 to send on identical frequency band, can not send in the zone that sends above-mentioned reference signal the DRS (Dedicated Reference Signal) based on the user, the data-signal that this moments eight, antenna port sent can be done demodulation with the public reference signal of 0-7 antenna port.
In addition, in the time sending by above-mentioned four physical antennas based on the public reference signal of user's DRS (Dedicated Reference Signal) and 4-7 antenna port, the base station can be as the subset based on the mapping pattern of user's downlink dedicated reference signal with the mapping pattern of the time-frequency domain of the public reference signal of 4-7 antenna port, makes the public reference signal of described 4-7 antenna port and does not conflict based on user's downlink dedicated reference signal.User terminal can carry out channel estimating and detection based on the reference signal that receives.
When eight antenna port transmission systems under the good scene of channel condition, except considering to use at the part antenna port design of lower reference signal density, in addition, can also carry out frequency hopping according to odd even time slot or odd even subframe and process to obtain frequency and time diversity gain.
As shown in Fig. 6 a, be the non-frequency hopping mapping pattern of the public reference signal of embodiment of the present invention 4-7 antenna port; As shown in Fig. 6 b, be the frequency hopping mapping pattern of the public reference signal of embodiment of the present invention 4-7 antenna port.In Fig. 6 b, with respect to Fig. 6 a, public reference signal is at frequency range N
1In, at time cycle N
2After carry out frequency hopping.As shown in the figure, the public reference signal that can find out the 4-7 antenna port can only send at partial-band, main purpose is to be used from the measurement of channel with public port 0-3 antenna port one, comprise the generation of channel information quality indicator (CQI) and pre-coding matrix, can be more sparse than 0-3 antenna port on the density, also can be more sparse than the dedicated pilot density at the 4-7 antenna port.
Step S303, the information after the base station will be shone upon sends through eight physical antennas, and the transmitted power of every antenna is 1/8 of the total transmitted power in base station.The transmitted power of each physical antenna is consistent, and gross power is identical with the transmitted power of LTE-R8 system, is conducive to the compatibility with existing LTE-R8 system.
In said method, by the reference signal of reference signal and configuration antenna port is set neatly, both guaranteed the compatibility of system, can support flexibly coexisting of LTE-R8 terminal and LTE-A terminal, also reduced system complexity.The plan of establishment according to above-mentioned reference signal, can not only guarantee the performance of LTE-A system, the precision of guaranteeing joint channel estimation can not reduce, can performance and the covering of system do not exerted an influence, go back simultaneously the expense that reduce is introduced by reference signal, the throughput of raising system, the raising system is to resource utilization.
The invention allows for a kind of base station, as shown in Figure 7, be the structural representation of embodiment of the present invention base station.This base station comprises mapping pattern determination module 100, Antenna Selection Module 200, mapping block 300 and sending module 400.
Wherein, mapping pattern determination module 100 be used for to determine sends the mapping pattern of descending public reference signal, and wherein, the mapping pattern of the public reference signal of 0-3 antenna port adopts the mapping pattern of the public reference signal of LTE-R8 system; Antenna Selection Module 200 is used for eight physical antennas are equally divided into four groups, every group of corresponding antenna port of physical antenna; Mapping block 300 is used for shining upon according to mapping pattern, and the public reference signal of 0-3 antenna port is mapped to eight physical antennas; Sending module 400 is used for the information after mapping is sent through eight physical antennas, and the transmitted power of every antenna is 1/8 of the total transmitted power in base station.
As embodiments of the invention, Antenna Selection Module 200 each group from four groups of physical antennas is selected an antenna and is formed four physical antennas, and four are sent by four physical antennas through sending module 400 based on user's DRS (Dedicated Reference Signal) and/or the public reference signal of 4-7 antenna port.
As embodiments of the invention, sending module 400 will send on the frequency band that the terminal use who supports base station eight antenna port transmission dispatches based on user's DRS (Dedicated Reference Signal), and the terminal use is used for channel estimating and signal demodulation with DRS (Dedicated Reference Signal); The public reference signal of 4-7 antenna port is sent on the frequency band of system's appointment, support the terminal use of base station eight antenna port transmission that public reference signal is used for channel measurement.
As embodiments of the invention, mapping pattern determination module 100 is used for determining to send the mapping pattern of downlink dedicated reference signal, be a subset as the mapping pattern of downlink dedicated reference signal with the mapping pattern of the time-frequency domain of the public reference signal of 4-7 antenna port, make the public reference signal of 4-7 antenna port and downlink dedicated reference signal not conflict.
As embodiments of the invention, Antenna Selection Module 200 is equally divided into four groups with eight physical antennas, comprising: physical antenna 1 and physical antenna 5 are one group, and physical antenna 2 and physical antenna 6 are one group, physical antenna 3 and physical antenna 7 are one group, and physical antenna 4 and physical antenna 8 are one group; Correspondingly, the public reference signal of 0 antenna port is mapped to physical antenna 1 and physical antenna 5 through mapping block 300, the public reference signal mapping block 300 of 1 antenna port is mapped to physical antenna 2 and physical antenna 6, the public reference signal mapping block 300 that the public reference signal mapping block 300 of 2 antenna ports is mapped to physical antenna 3 and physical antenna 7,3 antenna ports is mapped to physical antenna 4 and physical antenna 8.
As embodiments of the invention, Antenna Selection Module 200 each group from four groups of physical antennas is selected an antenna and is formed four physical antennas, and comprising: physical antenna 5-8 forms four physical antennas, and perhaps physical antenna 1-4 forms four physical antennas.
Above-mentioned base station equipment disclosed by the invention, by the DRS (Dedicated Reference Signal) of reference signal and configuration antenna port is set neatly, both guaranteed the compatibility of system, can support flexibly coexisting of LTE-R8 terminal and LTE-A terminal, also reduced system complexity, the precision of guaranteeing the user terminal joint channel estimation can not reduce, can performance and the covering of system do not exerted an influence, go back simultaneously the expense that reduce is introduced by reference signal, the throughput of raising system, the raising system is to resource utilization.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is by claims and be equal to and limit.
Claims (12)
1. the sending method of a reference signal in multi-antenna communication system, is characterized in that, comprises the following steps:
The base station determine to send the mapping pattern of descending public reference signal, and the mapping pattern of the public reference signal of 0-3 antenna port adopts the mapping pattern of the public reference signal of LTE-R8 system;
Described base station is equally divided into four groups with eight physical antennas, shines upon according to described mapping pattern, and the public reference signal of described 0-3 antenna port is mapped to eight physical antennas, every group of corresponding antenna port of physical antenna;
Information after described base station will be shone upon sends through described eight physical antennas, and the transmitted power of every antenna is 1/8 of the total transmitted power in base station;
Described base station each group from four groups of physical antennas is selected an antenna and is formed four physical antennas, and four are sent by described four physical antennas based on user's DRS (Dedicated Reference Signal) and/or the public reference signal of 4-7 antenna port.
2. the sending method of reference signal in multi-antenna communication system as claimed in claim 1, it is characterized in that, described DRS (Dedicated Reference Signal) based on the user sends on the frequency band that the terminal use who supports base station eight antenna port transmission dispatches, and described terminal use is used for channel estimating and signal demodulation with described DRS (Dedicated Reference Signal); The public reference signal of described 4-7 antenna port sends on the frequency band of system's appointment, supports the terminal use of base station eight antenna port transmission that described public reference signal is used for channel measurement.
3. the sending method of reference signal in multi-antenna communication system as claimed in claim 2, it is characterized in that, when the public reference signal with described DRS (Dedicated Reference Signal) based on the user and 4-7 antenna port sends by described four physical antennas, the mapping pattern of downlink dedicated reference signal is determined to send in described base station, a subset as the mapping pattern of described downlink dedicated reference signal with the mapping pattern of the time-frequency domain of the public reference signal of 4-7 antenna port, make public reference signal and the described downlink dedicated reference signal of described 4-7 antenna port not conflict.
4. the sending method of reference signal in multi-antenna communication system as claimed in claim 2, is characterized in that, the density of described DRS (Dedicated Reference Signal) based on the user is identical or lower with the density of the public reference signal of 2-3 antenna port.
5. the sending method of reference signal in multi-antenna communication system as claimed in claim 4, it is characterized in that, the density of the public reference signal of described 4-7 antenna port is lower than the density of the public reference signal of 2-3 antenna port or identical with the density of the public reference signal of 2-3 antenna port, perhaps, the density of the public reference signal of described 4-7 antenna port is lower than the density of described DRS (Dedicated Reference Signal) based on the user.
6. as the sending method of the described reference signal in multi-antenna communication system of one of claim 1 to 5, it is characterized in that, described base station is equally divided into four groups with eight physical antennas and comprises:
Physical antenna 1 and physical antenna 5 are one group, and physical antenna 2 and physical antenna 6 are one group, and physical antenna 3 and physical antenna 7 are one group, and physical antenna 4 and physical antenna 8 are one group;
Correspondingly, the public reference signal of 0 antenna port is mapped to physical antenna 1 and physical antenna 5, the public reference signal of 1 antenna port is mapped to physical antenna 2 and physical antenna 6, the public reference signal that the public reference signal of 2 antenna ports is mapped to physical antenna 3 and physical antenna 7,3 antenna ports is mapped to physical antenna 4 and physical antenna 8.
7. the sending method of reference signal in multi-antenna communication system as claimed in claim 6, is characterized in that, described base station each group from four groups of physical antennas is selected four physical antennas of an antenna composition and comprised:
Physical antenna 5-8 forms described four physical antennas, and perhaps physical antenna 1-4 forms described four physical antennas.
8. a base station, is characterized in that, comprises mapping pattern determination module, Antenna Selection Module, mapping block and sending module,
Described mapping pattern determination module be used for to determine sends the mapping pattern of descending public reference signal, and wherein, the mapping pattern of the public reference signal of 0-3 antenna port adopts the mapping pattern of the public reference signal of LTE-R8 system;
Described Antenna Selection Module is used for eight physical antennas are equally divided into four groups, every group of corresponding antenna port of physical antenna;
Described mapping block is used for shining upon according to described mapping pattern, and the public reference signal of described 0-3 antenna port is mapped to eight physical antennas;
Described sending module is used for the information after mapping is sent through described eight physical antennas, and the transmitted power of every antenna is 1/8 of the total transmitted power in base station;
Described Antenna Selection Module also is used for selecting an antenna from each group of four groups of physical antennas and forms four physical antennas, and four are sent by described four physical antennas through described sending module based on user's DRS (Dedicated Reference Signal) and/or the public reference signal of 4-7 antenna port.
9. base station as claimed in claim 8, it is characterized in that, described sending module will send on the frequency band that the terminal use who supports base station eight antenna port transmission dispatches based on user's DRS (Dedicated Reference Signal), and described terminal use is used for channel estimating and signal demodulation with described DRS (Dedicated Reference Signal); The public reference signal of described 4-7 antenna port is sent on the frequency band of system's appointment, support the terminal use of base station eight antenna port transmission that described public reference signal is used for channel measurement.
10. base station as claimed in claim 9, it is characterized in that, described mapping pattern determination module is used for determining to send the mapping pattern of downlink dedicated reference signal, be a subset as the mapping pattern of described downlink dedicated reference signal with the mapping pattern of the time-frequency domain of the public reference signal of described 4-7 antenna port, make the public reference signal of described 4-7 antenna port and described downlink dedicated reference signal not conflict.
11. base station as claimed in claim 10 is characterized in that, described Antenna Selection Module is equally divided into four groups with eight physical antennas, comprising:
Physical antenna 1 and physical antenna 5 are one group, and physical antenna 2 and physical antenna 6 are one group, and physical antenna 3 and physical antenna 7 are one group, and physical antenna 4 and physical antenna 8 are one group;
Correspondingly, the public reference signal of 0 antenna port is mapped to physical antenna 1 and physical antenna 5 through described mapping block, the described mapping block of the public reference signal of 1 antenna port is mapped to physical antenna 2 and physical antenna 6, the described mapping block of public reference signal that the described mapping block of the public reference signal of 2 antenna ports is mapped to physical antenna 3 and physical antenna 7,3 antenna ports is mapped to physical antenna 4 and physical antenna 8.
12. base station as claimed in claim 11 is characterized in that, described Antenna Selection Module each group from four groups of physical antennas is selected an antenna and is formed four physical antennas, comprising:
Physical antenna 5-8 forms described four physical antennas, and perhaps physical antenna 1-4 forms described four physical antennas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910076638 CN101777945B (en) | 2009-01-12 | 2009-01-12 | Method for sending reference signal in multi-antenna communication system and base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910076638 CN101777945B (en) | 2009-01-12 | 2009-01-12 | Method for sending reference signal in multi-antenna communication system and base station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101777945A CN101777945A (en) | 2010-07-14 |
| CN101777945B true CN101777945B (en) | 2013-05-08 |
Family
ID=42514290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910076638 Active CN101777945B (en) | 2009-01-12 | 2009-01-12 | Method for sending reference signal in multi-antenna communication system and base station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101777945B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231661B (en) * | 2011-07-22 | 2013-08-14 | 电信科学技术研究院 | Information transmission method, system and device |
| CN109787738B (en) * | 2012-12-31 | 2022-12-13 | 上海华为技术有限公司 | Reference signal configuration method, reference signal sending method and related equipment |
| CN105634574B (en) * | 2013-06-08 | 2019-01-25 | 华为技术有限公司 | Transmit method, base station and the user equipment of pilot signal |
| CN104301073B (en) * | 2013-07-17 | 2019-05-31 | 上海朗帛通信技术有限公司 | A kind of reference signal setting method in mobile communication system |
| CN104348763B (en) * | 2013-07-23 | 2018-06-05 | 华为技术有限公司 | A kind of channel measuring method and user terminal for extensive antenna |
| CN108781097B (en) * | 2016-03-31 | 2020-11-06 | 华为技术有限公司 | Reference signal sending method, reference signal receiving method, device and system |
| CN109257153B (en) * | 2017-03-24 | 2020-03-20 | 华为技术有限公司 | Reference signal sending method, receiving method and device |
| CN108988913B (en) * | 2017-05-31 | 2019-10-25 | 华为技术有限公司 | A kind of antenna terminal mapping method and the network equipment |
| CN115021879A (en) | 2017-08-21 | 2022-09-06 | 中兴通讯股份有限公司 | Reference signal transmission method and device, terminal, base station and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101340228A (en) * | 2008-08-07 | 2009-01-07 | 中兴通讯股份有限公司 | Transmission method of reference signal |
| CN101340227A (en) * | 2008-08-15 | 2009-01-07 | 中兴通讯股份有限公司 | Transmitting method and apparatus of downlink reference signal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7359718B2 (en) * | 2004-04-30 | 2008-04-15 | Hong Kong Applied Science And Technology Research Institute Co., Ltd. | Location determination and location tracking in wireless networks |
-
2009
- 2009-01-12 CN CN 200910076638 patent/CN101777945B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101340228A (en) * | 2008-08-07 | 2009-01-07 | 中兴通讯股份有限公司 | Transmission method of reference signal |
| CN101340227A (en) * | 2008-08-15 | 2009-01-07 | 中兴通讯股份有限公司 | Transmitting method and apparatus of downlink reference signal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101777945A (en) | 2010-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101777945B (en) | Method for sending reference signal in multi-antenna communication system and base station | |
| US9866302B2 (en) | Method for reporting channel state information, user equipment, and base station | |
| CN103703712B (en) | The method of configurating channel state information reference signals and base station | |
| CN102340379B (en) | CSI-RS (Channel Status Information-Reference Signal) transmission method and detection method, and devices of CSI-RS transmission method and detection method | |
| CN105812112B (en) | The configuration method and device of pilot frequency in wireless communication system | |
| US9735998B2 (en) | Transmission point indication in coordinated multi-point system | |
| CN101771444B (en) | Method for setting reference signals in multi-antenna system and base station | |
| KR102580213B1 (en) | Method and apparatus for data transmission in wireless communication system | |
| CN110417527B (en) | Method and device for measuring channel reference signal | |
| CN105723640B (en) | Method and arrangement for configuring CSI measurements | |
| US8588762B2 (en) | Method and apparatus for performing channel measurement for cell | |
| EP3627720A1 (en) | Method and apparatus for transmitting and receiving channel state information in wireless communication system | |
| US10652848B2 (en) | Method for transmitting common control information, method for receiving common control information, base station, terminal and storage medium | |
| CN108400848B (en) | Indication method and device | |
| CN103945447A (en) | Method for measuring downlink channel characteristic parameters, and user equipment | |
| CN104704897B (en) | Carrier wave collocation and base station, user equipment | |
| CN106209300B (en) | Control information sending method, control information receiving method, transmitter and receiver | |
| WO2014019874A1 (en) | Interference measurement resource (imr) signaling and use to support interference coordination between cells | |
| US10531440B2 (en) | Apparatus for transmitting and receiving downlink data in wireless communications system supporting cooperation between transmission points and method therefor | |
| CN108366375B (en) | Method and device for sharing downlink frequency spectrum | |
| CN102685038B (en) | A kind of method and system for demodulating the binding demodulation of pilot physical resource block | |
| CN107733611B (en) | Method and device for processing quasi-co-location information | |
| CN108365933B (en) | Method and device for transmitting reference signal | |
| CN104869649A (en) | Method for configuring coordinated multiple point transmission multi-cell measurement pilot frequencies in LTE (Long Term Evolution) system | |
| WO2018211821A1 (en) | Communication device, base station, method and recording medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: INST OF TELECOMMUNICATION SCIENCE AND TECHNOLGOY Free format text: FORMER OWNER: DATANG MOBILE COMMUNICATION EQUIPMENT CO., LTD. Effective date: 20110408 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100083 NO. 29, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING TO: 100191 NO. 40, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20110408 Address after: 100191 Haidian District, Xueyuan Road, No. 40, Applicant after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100083 Haidian District, Xueyuan Road, No. 29, Applicant before: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20210617 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
|
| TR01 | Transfer of patent right |